Cooling coil



A Jan. 12, 1932. J Q STATQN 1,840,613

COOLING cQIL Filed March 19, 1930 z/Qz// gmmntofv( i Patented Jaaiz, 1932 mural)` STATES PATENT OFFICE JOHN CURTIS STATON', OF ATLANTA, GEORGIA, ASSIGNOR T0 THE COCA-COLA COMPANY r 0F ATLANTA, GEORGIA, A CORPORATION 0F DELAWARE 00013111' G COIL y Application led lai-ch 19, 1930. Serial lo. 437,183. The .invention relates to cooling coils and To transfei` heat from the liquid tube to has as an object the provision of a plurality of coils arranged for circulation of refrigerant in certain of said coils and a liquid to be cooled in other of said coils and having means for ready heat transfer from one coil to the other for refrigeration of the liquid.

It is a further object of the invention to provide a cooling coil vwhich may be utilized to refrigerate a liquid circulating in a coil adjacent a coil in which a refrigerant is circulated and to also utilize the refrigerating coil for refrigeration of a receptacle or a liquid therein.

Further objects of thelinventio-n will ap pear from the following description when read in connection with the accompanying drawings showing an illustrative embodi ment of the invention and wherein Fig. 1 is a plan view; Y

Fig. 2 is an end view; and

Fig. 3 is a side view from the right of Fi 1. f

is shown the device comprisesa tube 10 which in the form shown has an inlet at 11 from a source of liquid supply not shown and which passes about three sides of a rectangle and being supplied with a return bend 12 returns about the same three sides of the rectangle. The tube is then dropped) to a lower level as by means of a bend 13 and agam passes about the three sides of the same rectangle butuponthe inner bank of tubes, whereupon by means of a bend 14 the tube is passed to the outside of the bank of tubes in the rectangle, finally reaching-the outlet 15. A tube 16 for refrigerant extends from an inlet at 17 over a path similar to that of the tube 10 but. initially passes upon the 'inner bank of tubes in the rectangle to the bend 18, returning in the outer bank to the bend 19, whereupon the tube 16 passes to a lower level, retraces its path, rst in the outer bank of the tubes to the kbend 20 transferring it to the inner bank', whereupon the tube eX- tends about the rectangle to the outlet 21 .for refrigerant. The tubes for liquid and for refrigerant are thus alternated in the tiers and banks and the warmest liquid is adjacent the coolest refrigerant.

the refrigerant tube there are shown a plurality of tins` in the form of plates 22 which are in close contact ywith the walls of the Q tubes and which additionally assist in main- -indicated as passing to the exterior of such a receptacle. If so used water or other liquid may be placed in the receptacle and bottles or other objects to be cooled may be immersed in the water within the open space of the rectangle whereupon the fins are operative not onl to transfer heat from the liquid to be coo ed in the coil but also to transfer heat from liquid in the receptacle in exterior contact with the fins, to the refrigerant coil.

It is obvious that the tubes could be caused to pass across the side of the rectangle at present shown open, or could be made circular instead of rectangular in outline without departing from the spirit of the invention, the important element being-the transfer of heat between tubes by means of plates in contact with the walls of both and the arrangement of the various tiers of the tubes containing liquid to be cooled alternatelywith the tiers of the tubes. containing the refrigerant.

The formation of the coil to conform to sides of a rectangle has certain advantages by reason of which this form is preferred. When' this form is used the assembly may be made to fit into a rectangular container -having the' center open for reception of articles, as bottles of soft drinks, which articles may be cooled by liquid in which the articles are immersed. Also by virtue of the rectangular form the adjacent plates may beV parallel with each other and normal to the tubes, thus enabling a more efficient spacing.

It is preferred to form the tubes of copper for its ready transfer of heat and the plates or iins of aluminum, these materials being found eiiicient for use.

The refrigerant utilized may be expand` ing sulphur dioxide, carbon dioxide, or any 5 other well known refrigerant and the inlet to the refrigerant coil indicated at 17 may be connected to the output of a compressor and the outlet 2l of this coil may be connected to the intake of the same compressor, which compressor forming no part of the invention is not shown in the drawings. When used in the dispensing of soft drinks, bottled drinks may be placed in a receptacle such as indicated at 23 immersed in cold water therein and water, plain or carbonated for use at a fountain, may be circulated in a pipe 10.

Minor changes may be made in the physical embodiment of the invention within the al) scope of the appended claims without departing from the spirit of the invention.

What is claimed is:

l. A cooling coil comprising in combination, a liquid tube extending about a plurality-of sides of a rectangle and returning about said sides in a path parallel with and spaced inwardly from its first extension, a refrigerant tube parallel` with and spaced vertically from said liquid tube, and plates having openings occupied by said tubes, said plates contacting with the walls of said tubes whereby to facilitate heat transfer between said tubes.

2. A cooling coil comprising, in combination, a liquid tube extending about a plurality of sides of a rectangle in horizontally spaced parallel turns and in a plurality of vertically spaced portions, a refrigerant tube having portions alternating vertically with said liquid tube portions and turns parallel with said liquid tube turns and a plurality of spaced parallel plates having openings through which said tubes pass in each of said turns and portions whereby to facilitate heat transfer between said tubes.

3. A cooling coil comprising, in comb-ina- -tion, a liquid tube coil formed with a plurality of straight horizontally spaced parallel portions extending along a plurality of the sides of a rectangle, said portions also comprising a plurality of vertically spaced portions parallel with said horizontally'spaced portions and said portions connected to form 55 a single conductor for liquid, a refrigerant tube having portions parallel with, spaced from and alternating vertically with;V the turns of said liquid tube and likewise forming a single conductor for refrigerant and spaced vertical plates of heat conducting material having openings through which each of said tube portions pass whereby to'hold said coils in assembly and to assist heat transference between said tubes.

5 JOHN CURTIS srarou. 

